- Author: Ulrich Höhle
- Language: English
- Year: 1999
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- Year: 1998
- Author: Didier Dubois Henri Prade (auth.) Didier Dubois Henri Prade (eds.)
- Language: English
- Year: 2000
- Author: Jan Jantzen Henk Verbruggen Jens-Jørgen Østergaard (auth.) Hans-Jürgen Zimmermann (eds.)
- Language: English
- Year: 1999
- Author: James C. Bezdek James Keller Raghu Krisnapuram Nikhil Pal
- Language: English
- Year: 2005